Building structure



FIG. 1 is a left front perspective view of a building structure showingmy new design;

FIG. 2 is a right rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a left side elevational view, the right side elevation being amirror image thereof.

The ornamental design for a building structure, substantially as shown and described. 